Lol, yeah! Its a compost soil recipe created by John Innes that, as I've been told, is optimal for aqua soil. Big names like Scott's make their own blend, but its only available outside the US
I doubt u can find it around the us. Find out whats in and blend your own. I dont use soil substrates but alot of people on this forum seem to.like miracle grow organic. And that can be found anywhere.